Over at this British site, we learn that "the Materazzi-felling incident was provoked not by references to Zidane's mother and his Algerian ancestry, but rather the suggestion that Italian wine may be of equal, or superior, quality to its French equivalent." More importantly, we learn that the incident looked very different to viewers of different nationalities. (Be sure to scroll down far enough see how Zidane may have actually save Materazzi's life.)